INFLUENCE OF ROCK ANISOTROPY AND TIME-DEPENDENT DEFORMATION ON THE STRESS-RELIEF AND HIGH-MODULUS INCLUSION TECHNIQUES OF IN SITU STRESS DETERMINATION
TWO OF THE MOST POPULAR TECHNIQUES USED IN THE DETERMINATION OF IN SITU ROCK STRESSES ARE THE STRESS-RELIEF AND HIGH-MODULUS INCLUSION METHODS. DEFORMATION AND STRAINS OBSERVED IN THE MEASURING INSTRUMENTS ARE USUALLY INTERPRETED ON THE ASSUMPTION THAT THE ROCK BEHAVES AS A HOMOGENEOUS, ISOTROPIC, LINEARLY ELASTIC MEDIUM, A SITUATION WHICH IS NOT EVEN APPROXIMATELY CORRECT IN SOME PRACTICAL CASES. THIS PAPER PRESENTS A THEORETICAL ANALYSIS OF THE INFLUENCE OF' /1/ ROCK ANISTROPY, OF THE TRANSVERSELY ISOTROPIC KIND, ON THE THE ACCURACY OF VALUES OF IN SITU STRESSES DETERMINED FROM THE USUAL ISOTROPIC ANALYSIS AND /2/ TIME-DEPENDENT ROCK DEFORMATION, REPRESENTED AS LINEAR, ISOTROPIC, VISCOELASTIC CREEP, ON THE STRESSES DEVELOPED IN HIGH-MODULUS PLUGS. IT IS SHOWN THAT SIGNIFICANT ERRORS /OVER 50 PER CENT FOR ONE STRESS-RELIEF EXAMPLE CHOSEN/ MAY BE INTRODUCED BY NEGLECTING THESE FACTORS. /AUTHOR/
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Supplemental Notes:
- No 402, pp 190-206, 5 FIG, 1 TAB, 8 REF, 2 APP
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Authors:
- Berry, D S
- Fairhurst, C
- Publication Date: 1965-10
Media Info
Subject/Index Terms
- TRT Terms: Anisotropy (Physics); Creep; Deformation; Field tests; Isotropy; Plugs (Fillers); Rocks; Stresses; Theory; Time; Viscoelasticity
- Old TRIS Terms: Anisotropy; Determination; Insitu methods
- Subject Areas: Geotechnology; Highways;
Filing Info
- Accession Number: 00234154
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 5 1994 12:00AM